I would like to know why I cannot take a bath?

On the 20th of June, I suffered a heart attack in the LAD region of the heart. I was discharged from the hospital yesterday. They went over about 10,000 things I need to do or avoid doing. However, I was told I cannot take baths but no one has explained why. When I am not feeling well, sitting and soaking in a nice war bath tub is the thing I love to do most.